Q10 all the way in this instance
Q10 would still remain a better choice. A bit of software, interface tweak, adn it is good to go... Classic would be useful for perhaps those who do not want to change their old habits, or have the luxury of all those buttons that they were used to... Change of habits is a difficult thing to achieve....
Spec Wise- Q10
User experience - probably q10
use of phone - can't say
Ease of taking up a new phone - if you had bb7 or older - definitely Classic,
If you started with BB10-- Q10